Weighing-machine



(No Model.)

3 Sheets-Sheet; 1. F. H. RICHARDS. WEIGHINGl MACHINE.

In we?? a Patented ont. 29, 1895.

AN 5R90! B GRAHAM.PHOTO-LITHQWASHINGTONJ C (No Model.) 3 Sheets- Sheet2.

F. H. RICHARDS. WBIGHING MACHINE.

W1' fn esses: jnwen for:

(No Model.) 3 sheets-sneen a.

F. H. RICHARDS. WEIGHING MACHINE.

No. 548,848. Patented Oct. 29,1895.`

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ANDREW ILGHAHAM PHOTO-LUM() WASH|NG`ON,DC.

'Unirse STATES PATENT OFFICE.

FRANCIS H. RICHARDS, OF HARTFORD, CONNECTICUT.

WEIGHING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 548,848, dated October29, 1895.

Application tiled May 24, 1 85.

'To @ZZ whom may conceive:

Be it known that I, FRANCIS H. RICHARDS, a citizen of the United States,residing at Hartford, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inWeighing-Machines, of which the following is a specification.

This invention relates to weighing machines, the object being to providean improved organization of stop devices coacting with the valve and thebucket and positioned each relatively to the other for limiting andreducing the thrust and strain from all directions on the valve andbucket during the operation of the machine, whereby the presentimprovements are especially adaptable to machines for securing true andaccurate measurements in relatively-large loads or quantities ofmaterial.

The present invention is in the nature of an improvement on theweighing-machine described and claimed in my application, Serial No.546,612, led April 22, 1895.

In the drawings accompanying and forming part of this specification,Figure l is a righthand end elevation of a weighing machine embodying mypresent improvements, the bucket being illustrated as empty and thevalve open for permitting a flow of the supply-stream to the bucket.Fig. 2 is a similar View illustrating the bucket as discharging a load.Fig. 3 is a view similar to Figs. l and 2, illustratingthe bucket ashaving discharged its load and as having risen, the valve still beingshown locked. Fig. l is a front elevation, and Fig. 5 a plan view. Fig.6 is a right-hand end-elevation ofthe weighing-machine and illustratesone modied form of the invention and shows the parts in the positions inwhich they are shown in Fig. l, and Fig. 7 is a similar view showing theparts in the positions which they are shown as occupying in Fig. 3.

Similar characters designate like parts in all the figures of thedrawings.

The framework for carrying the operative parts of the machine may be ofany suitable construction, being shown comprising side frames connectedby a top plate or beam 5. There is shown in the drawings but one of theside frames, and it is designated therein as 2.

Serial No; 550,537. (No model.)

The top plate or beam 5 is illustrated as having suitably securedthereto the hopper I-I.

The bucket (designated by G) is of the single-chambered type or classand is supported under the hopper H to receive material therefrom.

As a means for controlling and regulating the stream from thesupply-chute any suitable valve may be employed. There is illustrated inthe drawings at 70 a valve substantially similar to that described andclaimed in my Letters Patent No. 535,727, 'granted March 12, 1895. Thevalve 70 is shown pivoted within arms or brackets 5', depending from thetop plate 5 of the machine, the pivot or axis of movement of the valvebeing designated by 70. The valve 70 is illustrated as locatedsubstantially beneath the mouth of the supply-chute in position forsupporting the descending column or mass when the valve is closed. Thevalve is also preferably balanced, so as to have, normally, no tendencyto either open or close, the balance-weight being shown herein as ashaft QOeXtending from opposite ends of the valve-pan.

A portion of the means employed for supporting the bucket-closer (notshown) is illustrated in the drawings as comprising an inverted toggleconnection. This toggle connection consists of some suitablerocker-such, for instance, as O-which is illustrated as secured toarock-shaft 550', jour'naled in bearings 550, one on each side of theupper rear portion of the bucket G. The rocker is shown as havingpivoted thereto a connecting -rod 596, the opposite end of thisconnecting-rod being pivotally connected tothe closer. (Not Shown.)

In connection with a valve and a bucket mechanism and with a pair ofmain stops, one operative with the valve as a valve-stop and the otherconstituting a bucket-discharge stop, I employ a pair of locking-stopsintermediate of the valve-stop and the bucketdischarge stop and each inposition and adapted for limiting the operation of the otherlocking-stop and also in position and adapted for respectively limitingthe operation of the valve and bucket-discharge stops.

In connection with a valve and bucket mechanism and with apair of mainstops, one

of which is operative with the valve as a valve-stop and the other ofwhich constitutes a bucket-discharge stop, I also employ an oscillatorylockingstop, which has a stop-face relatively adjacent to the center ofmovement of said locking-stop and also has said stop-face normally inlocked engagement with one of the main stops, this locking-stop beingprovided with an arm having a working face relatively remote from thecenter of movement of said locking-stop and having said working face inposition and adapted for limiting the movement of the other main stop.

The rocker 550 is shown as serving as a bucket-discharge stop and ashaving a curved stop-face 413', which is illustrated as defined by anarc drawn from the rock-shaft 550 or pivot of said rocker as a center.The rocker is also shown as provided with a relativelyshortsubstantially-straight face or portion, intended lfor serving as acam-face, and is disposed between the center of movement of said shaftandthe otherstop-face, and which is designated by 413". The peculiarfunctions of the curved face 413 and the straight stop or cam-face 413will be hereinafter made apparent.

The valve is shown provided with a stop 412, also termed a main stop,and is ,illustrated as having a curved stop-face 412, defined by an arcdrawn from the pivot or center of movement of said stop 412 as acenter.The valve-stop 412 is also shown provided with a relatively-short stopor camface 412, illustrated as forming a continuation of the curved face412 and located between the first-mentioned stop-face and the center ofmovement of said stop 412.

Means coacting with the valve-stop and with the bucket-discharge stopare employed for reciprocally limiting and regulating the movements ofsaid stops, and through them the valve and closer. The means employedcomprise two intermediate shiftable locking members ol stops in the formof levers, each adapted for limitingand regulating the operation of theother, for minimizing lateral and direct strain on the valve and closerand their stops, and for securing quick, close, and responsive action ofthe main stops at all times, whereby it is possible to secure accurateand positive operation of the machine during the process of weighing.These intermediate shittable locking members or stops compensate for andtake uplost motion between the valvestop and the bucket-discharge stop,and each intermediate member serves as a positive lock for the other andfor its respective main stop. The upper of the two members or stopsserves during one period of the operation of the machine as an effectivevalve lock or limiter and the other or lower of the two intermediatemembers serves as effectively as a closer lock or limiter by regulatingthe movements or operation of the valve-stop and the bucket-dischargestop, which control, respectively, the valve and the closer, the latternot being shown. Said locking-stops are, therefore, alternatelyshiftable relatively to the main stops. The lower one of theintermediate shiftable stop members is illustrated as comprising a leverSO and as pivotally carried by the bucket for permitting an oscillatorymovement of said lever. This intermediate stop member 8O is illustratedas provided with two oppositelydisposed arms or levers and 80,constituting, respectively, stop-arms and lockingarms. The lockingmember 8O co-operates with the bucket-discharge stop, and itis shownprovided With a stop or holding face 81, which when the bucket-closer isin the position indicated in Fig. 1,illustrating the valve as open andthe closer, (not showm) to which the bucket-discharge stop 550 isoperatively connected, as closed, engages the stop-face or cam portion413 of the said bucket-discharge stop for locking said bucket-dischargestop. The intermediate stop member S0 is illustrated as having acounterweight for maintaining the locked engagement of thebucketdischarge stop and the locking-lever stops.

The stop or holding face 81 of the intermediate stop member 80 isillustrated as being relativelyy adjacent to the center of movement ofsaid intermediate member 8O and the line of engagement of thebucket-discharge stop, and this locking-lever stop is, preferably, aboutcoincident with the angle of repose ot the metals constituting theengaging parts of the same, so that it will require but a minimumexpenditure of power to effect their disengagement.

The stop-arm 80 of the lower intermediate locking member 80 is shownwith its stop or working 'face 80 relatively remote from the stop-face81 of said locking member.

Heretofore it has been customary for the shiftable member 82 to receivethe thrust directly from the bucket-discharge stop. By my presentimprovement the locking member or stop SO, which is illustrated asinterposed between the bucket-discharge stop 550 and the shittablemember 82, serves as a thrustreceiving member for receiving the thrustfrom the bucket-discharge stop. This thrust is in turn taken up orreceived by the shiftable member or latch S2J`which is substantiallyparallel to the line of thrust of the bucket-discharge stop, but ismaterially reduced by reason ot' the interposition ot' the lockingmember or stop SO between the bucket-discharge stop 550 and the latch orshiftable member 82. The thrust exerted by the bucket-discharge stop 550against the locking member or stop SO is substantially in aperpendicular direction, as is the thrust eX- erted against the latch orshittable member 82 by the locking member or stop 80, the latch S2serving as a fixed abutment until tripped for discharging thebucket-load.

It is obvious that by the interposition of the locking member or stop 8Obetween the IOO IOS

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bucket-discharge stop 550 and the latch or shiftable member the thrustexerted by the bucket-discharge stop on the latch is so materiallyreduced as to render the organization of stop devices just describedpeculiarly efficient for accurately weighing relatively large quantitiesor loads of material.

The upper of the intermediate shiftable locking stops or members isillustrated at 85 as an oscillatory lever pivoted at 86 to an arm 5,extending from the side frame 2, and is shown provided with a stop orholding face 85', disposed relatively adjacent to its pivotal point S6,which when the valve is closed is in engagement with the stop-face 412ofthe valve-stop 412. The locking member or stop S5 is shown providedwith a counterweight, which tends normally to exert an upward pressureof the said stop member 85 against the curved face of the valve-stop,and when the two stop-faces 85 and 412 are opposite the stop or holdingface 85 will be projected into the stop-face 412 by means of thecounterweight of the locking member or stop 85 for thereby locking thevalve closed. The line of engagement of the stop-faces 85 and 412should, preferably, be about coincident with the angle of repose of themetals composing these stop-faces, so that but a minimum expenditure ofpower will be necessary to disengage or unlock the same. Theintermediate stop member or lever 85 is illustrated as provided with aforwardly-extending lever 85, which has a working or stop face 85',illustrated as relatively remotev from said locking member.

The stop or working faces 85 and 80 of the arms 80 and 85 should,preferably, be at about the angle of repose of the metals comprisingthese parts, so that the frictional resistance offered the one by theother during the operation of the machine may be reduced materially.

The valve is shown in the drawings as having a connecting rod or armpivotally secured to the upper rear portion thereof. The lower end ofthis rod is in operative connection with some suitable valve-openingactuator. (Not shown.)

The closeo-latch S2 is illustrated as provided with a stop-arm 82',disposed in the path of a latchactuatorsuch, for instance, as 88- shownas formed on the connecting-rod 558. When the stop-arm 82 of the latchor shiftable member 82 is engaged by the latch-actuator, the latch orshiftable member 82 will be tripped for permitting a discharge of thebucket through the operative connection of the closer (not shown) withthe bucket-discharge stop or rocker 550, as will be hereinafterdescribed.

For securing the rocker orbucket-discharge stop in a position formaintaining the closer closed the latch or shiftable member 82 is shownas counterweighted and at the end thereof opposite to that having thecounterweight as provided with a stop-face or detent 83, co-operatingwith a corresponding stopface or detent 84, illustrated as forming apart of the lower intermediate locking member 80. The stop-face 83 inturn is composed of tWo stop-faces 83 and '83, one of which 83 isparallel to the line of thrust of the bucket-discharge stop and servesfor preventing upward movement of the latch. The other stopface S3 isdisposed perpendicularly to the stopface S3 and is for receiving thethrust of the stop member S0. On the closing of the valve by avalve-closing actuator (not shown) the said valve turns on its pivot andcarries with it the connecting-rod 558, having the latch-actuator 8S,which engages the stop-arm 82 on the closer-latch 82. This operationdisengages the stop-faces or detents of the latch or shiftable member 82and the locking member or lever SO and, in a manner hereinafterdescribed, permits the disengagement of the locking stop-faces 413 and8l of the bucketdischarge stop and the lower intermediate member 80.

In the modification shown in Figs. 6 and 7 I employ but onelocking-stop. The operation of this modified form of the invention issubstantially similar to that form illustrated by the other views. Thislocking-stop' is shown pivoted to the bucket G and is shown providedwith a stop -face or cam face 8l relatively adjacent to the center ofmovementor pivot of the locking-stop. When this locking-stop is in theposition in which it is shown in Fig. 6, it being there illustrated asin locked engagement with the bucket-discharge stop, held in this lockedposition by means of the stop or cam face Sl engaging the correspondingstop or cam face 413 of the bucket-discharge stop 550, the Vcloser (notICC shown) is closed and the valve is open, permitting the full streamto enter the bucket. As the bucket descends, the valve simultaneouslytherewith gradually closes. The valve in closing carries with it thevalve-stop, the cam-face 412 of which rides over the Working face 80 ofthe locking-stop. W'hen the stop-face 412 of the valvestop 412 isapproximately opposite the working or stop face 80 of the locking-stop,the shiftable member or latch 82 is in a position to have its stop-armS2 engaged by the actuator S8. When thus engaged, the shittable memberor latch 82 is disengaged from the locking-arm S0 of the locking stop,which operation disengages these two parts. When the shiftable member orlatch 82 and the locking-arm 80 are disengaged, the bucket-dischargestop, by reason of its superior power relatively to thelockingstop 80,tends to carry or oscillate said locking-stop on its pivot, so that thestop-face 80 of the locking-stop S0 and the stop-face 412 will engageeach other. The counterweight of the locking-stop S0 then tends toproject the stop-face 80 into the stop-face 412 of the val ve-stop 412.In this latter position the parts are shown in Fig 7. In this view thelocking-stop 80 is shown as being entirely out IIO of locked engagementwith the bucket-discharge stop and in position where it may limit themovement of the valve-stop.

The operation of the improved machine herein described is as follows:Taking the parts as shown in Fig. l, where the valve is shown inposition for permitting the stream to iiow into the bucket, it will beassumed that the stream is entering the bucket. It will be observed thatthe stop 8l ot' the lower of the intermediate locking members or leversis shown in engagement with the co-op-` erating locking-stop face or camportion 413 of the bucket-discharge stop and that the stop-face 85 ofthe upper of the intermediate locking members or levers is disposedrelatively remote from the stop-face 412 ot' the Avalve-stop 412. Thearm or lever 85 is shown disposed in a plane below the upper edge orengaging-face of the lower intermediate lever or member SO. 'As thevalve closes, the cn rved face 412 of the stop 412 thereof rides overthe stop-face 85 of the intermediate member 85 until the two stop-faces412 and 85 are opposite each other, when the stop-face 35 of theintermediate stop member is projected into the curved stop-face 412 byreason of its counterweight. The valve is shown in Fig.

2 in a locked position and it is assumed thatv the bucket is justdischarging-a load of material. It will be observed that the stop-faces85 and 4l2are in engagement. Simultaneously with the projection ot' thestop-face 85 into the stop-face 412 the forward edge of the interlockingstop or member 85 is carried upward past the engaging-face of the leveror arm of the lower locking member or stop 80. As the valve closes itcauses the connecting-rod 558, which has the latch-actuaer 88, todescend, and at the proper time said'atch-actuator engages the stop-arm82 of the closer-latch 82, carrying said closerlatch downward anddisengaging the stop-face or detent 83 of the closer-latch 8O and thestop-face or detent 84, which forms a part of the locking-lever for thebucket-discharge stop. On the disengagement of these stopfaces or twodetents the stop portion 413 of the rocker acts as a cam and by itsgreater power carries the upper arm 80 of the lower intermediate lockingmember under the forwardly-extending arm 35 of the upper intermediatelocking member 85. The position then assumed by the parts is shownbyFig. 2. In Fig. 2, where the valve is shown locked in its closedposition, it will be observed that the upper arm 80 of the lowerintermediate locking member or stop 80 is under and engaged by theforwardly-extending arm 85 of the upper intermediate locking member S5.It will be obvious, then, that the lower intermediate locking memberserves the additional function when in this position of assisting theupper intermediate locking member to lock the valve closed. As soon asthe valve is securely locked the bucket discharges its load. On thedischarge of a load the bucket of course ascends, and in ascending therocker or bucket-discharge stop 550 turns on its pivot 550', and thecurved face 413l thereof rides over the stop-face 8l of the lowerintermediate locking member until the stop-face S1 is opposite thestop-face 413 of the bucket-discharge stop,the said stopsSl and413riding over each other and each serving as a cam relatively to theother, the stop-face 413acting on the stop-face or cam portion 8l,permitting the arm SO of the member 8O to move, gradually, from underthe arm 85 of the upper member. When the two stop-faces 8l and 413 arefully engaged, the detents S4 and 83, respectively, of the arm 80 of thelower intermediate locking member or stop and of the closer-latch willalso be engaged. When the latter operation has taken place, the upperarm SO of the locking member SO is entirely out of the path of the arm85 ot' the locking member 85, so that the valve 70 can be opened.

On reference to Fig. 3, where the bucket is represented as just havingdischarged aload, it will be noticed that the upper intermediate lockingmember or stop 85 serves as a limiter for the lower member SO-that is,by reason of the greater weight on the upper member, this in turn tendsto maintain the lower locking member or stop in a position where thecurved face 413 may freely ride over the stop-face 8l of the lowerlocking member or stop 8O until the stop-face 8l of the lower member 8Ois opposite the stop-face 413 of the bucket-discharge stop 550, when,byreason of the peculiar cam formation of the stop-faces- 81 and 413relatively to each other and through the agency of the lowercounterweighted member 80, these stop faces are brought into operativerelation. As the curved face 413 rides over the stop-face 8l the arm 80of the lower locking member 80 is carried out of the path of the arm S5of the upper locking member 85 and simultaneously therewith thestop-faces 412 of the Valvestop and arm 85 of the upper locking member85 are disengaged for permitting the opening of the valve.

Each of the stop members 8O and 85 is so disposed relatively to theother that the stream cannot enter the bucket until the bucketcloser isclosed, and when the mass of material is flowing into the bucket saidcloser is so locked that the mass cannot be discharged from the bucketuntil at the proper time the bucket-disch arge stop is released fordischarging the load.

Having thus described my invention, what I claim is l. In aweighing-machine,the combination with a valve and a bucket mechanism; ofa pair of main-stops, one operative with the valve as a valve-stop, andthe other constituting a bucket-discharge stop; and a pair oflockingstops intermediate ot' the Valve and the bucket-discharge stops,and each in position and adapted for limiting the operation of the ICOlIO

other locking-stop, and also for respectively limiting the operation ofthe valve-stop and the bucket-discharge stop, substantially asspecified.

2. In a Weighing-machine, the combination with a valve and a bucketmechanism; of a stop for the valve; a bucket-discharge stop; alocking-stop normally in locked engagement with the bucket-dischargestop, and adapted also for limiting the movement of the valvestop; andmeans for releasing the locking-stop from locked engagement with thebucket-discharge stop, whereby said locking-stop will be free to beprojected into engagement with the valve-stop, to thereby limit themovement of the valve-stop, substantially as specified.

3. In a Weighing-machine, the combination with a valve and a bucketmechanism; of a stop for the valve; a bucket-discharge stop; alockingstop normally in locked engagement with the bucket-dischargestop, and adapted also for limiting the movement of the valvestop; alatch in position and adapted for holding the locking-stop in engagementwith the bucket-discharge stop; and an actuator in position and adaptedfor releasing said latch from engagement with the locking stop, wherebysaid locking-stop will be free to be projected into engagement with thevalvestop, to thereby limit the movement of the valve-stop,substantially as specified.

4. In a Weighingmachine,the combination with a valve and a bucketmechanism; of a pair of main-stops, one operative with the valve as avalve-stop, and the other constituting a bucket-discharge stop; andintermediate locking-stops in position and adapted, respectively, forlocked engagement With the main-stops, and each of said intermediatelocking-stops having a stop-arm provided With a working-face, remotelydisposed relatively to the point at which the locking-stop is in lockedengagement with the main-stop, and having each of said Working-faces inposition and adapted for engaging the other Workingtace, to therebylimit the movement of the respective intermediate lockingstops,substantially as specified.

5. In a Weighingmachine, the combination with a bucket havingabucket-discharge stop; of a locking-stop normally in locked engagementwith the bucket-discharge stop; and a shittable member in position andadapted for normally holding the locking-stop in locked engagement withthe bucket-discharge stop, substantially as specified.

6. In a Weighing-machine, the combination with a bucket having abucket-discharge stop; of a locking-stop normally in locked engagementwith the bucket-discharge stop, and constituting a thrust-receivingmember for receiving the thrust of the bucket-discharge stop; anda latchdisposed parallel to the line of thrust of the bucket-discharge stop,for holding the locking-stop in locked engagement with thebucket-discharge stop, sub stantially as specified.

7. In a weighing-machine, the combination with a bucket having abucket-discharge stop; of a counterweighted locking-stop normally inlocked engagement With the bucket-discharge stop, and constituting athrust-receiving member for receiving the thrust ofthe bucket-dischargestop; and a counterweighted-latch disposed substantially parallel to theline of thrust of the bucket-discharge stop, for holding thelocking-stop in locked engagement with the bucket-discharge stop,substantially as specified.

8. In a Weighing-machine, the combination with a bucket having abucket-discharge stop; of a locking-stop normally in locked engagementwith the bucket-discharge stop, and constitutingathrust-receiving memberforreceiving the thrust of the bucket-discharge stop; a latch disposedsubstantially parallel to the line of thrust of the bucket-dischargestop, and having a pair of stop-faces normally in engagement With thelocking-stop, and disposed,the one substantially parallel to the line ofthrust of the bucket-discharge stop, and the other substantiallyperpendicular to the line of thrust of said bucket-discharge stop,whereby, the former of said stop-faces serves to limit the movement ofsaid latch, and the latter of said stop-faces serves to receive thethrust of the bucket-discharge stop, substantially as specified.

9. In a Weighing-machine, the combination with a bucket having abucket-discharge stop; of an oscillatory locking-stop having a stopfacerelatively adjacent to the center of movement of said locking-stop andnormally in locked engagement with the bucket-discharge stop, and havingan arm provided with astopface relatively remote from the center ofmovement of said oscillatory locking-stop; and a latch having astop-face normally in engagement with said stop-face of said arm,substantially as specified.

l0. In aWeighing-machine, the combination with a bucket having anoscillatory bucketdischarge stop provided with two stop-faces, one ofwhich is defined by an arc struck from the center of movement of saidstop, and the other of which forms a continuation of said rst-mentionedstop-face, and is disposed between said rst-mentioned stop-face and thecenter of movement of the stop, and constitutes a cam-face; of anoscillatory lockingstop having a stop-face relatively adjacent to thecenter of movement of said locking-stop, and having said stop-facenormally in lockedengagement with said cam-face of the bucketdischargestop, and also having an arm provided With a Working-face relativelyremote from the center ot' movement of said oscillatory locking-stop;and a latch having a stopface normally in engagement with said stopfaceon the arm of the locking-stop, substantially as specified.

ll. In a Weighing-machine, the combination with a bucket having abucket-discharge stop; of a lockingstop normally in locked engage- ICOIIO

ment with the bucket-discharge stop; a latch adapted for normallyholding the locking-stop in locked engagement with the bucket-dischargestop; and an actuator in position and adapted for releasing theshiftable member from engagement With the locking-stop, and therebydisengaging the locking stop and the bucket-discharge stop,substantially as specified.

12. InaWeighing-machine,thecombination with a valve mechanism, and Witha bucket; ot' a bucket-discharge stop; a locking-stop normally in lockedengagement with the bucketdischarge stop; alatch forholdingthelockingstop in locked engagement with the bucketdischargestop; and an actuator1 carried by the valve and in position and adaptedfor releasing the latch from engagement with the locking-stop, andthereby disengaging the lockingstop and the bucket-discharge stop,substantially as specified. v

13. InaWeighing-machine,thecombination with a valve having a valve-stop,and a bucket having a bucket-discharge stop, each of said stopsconstituting a main-stop; of a pair of shiftablelocking-stops, onenormally in locked engagement with the valve-stop, and the othernormally in locked engagement with the bucket-discharge stop, and havingsaid locking-stops alternately shiftable out of locked engagement withtheir respective main-stops, substantially as specified.

14. InaWeighing-machine,thecombination With a valve and a bucketmechanism; of a pair of oscillatory main-stops, each having twostop-faces, one of Which is dened by an arc struck from the center ofmovement of said stop, and the other of which forms a continuation ofthe first-mentioned stop-face and is disposed between saidfirst-mentioned stopface and the center of movement of the stop, andconstitutes a cam-face; a pair of shiftable countervveightedlocking-stops in position and adapted for reciprocally limiting themovements of each other, and each of said lockingstops having astop-face relatively adjacent to the center of movement thereof, andadapted .for engagement with the cam-face of the correspondingmain-stop,substantiallyas specified.

15. In aWeighing-machine, the combination with a valve and a bucketmechanism; of a pair of stops, constituting, respectively, a valve-stopand a bucket-discharge stop; and an oscillatory locking-stop having astop-face relatively adjacent to the center of movement of saidlocking-stop, and having said stop-face normally in locked engagementwith one of said pair of stops, and said locking-stop also having an armprovided with a Working-face relatively remote from the center ofmovement of said locking-stop, and having said Workingface in positionand adapted to limit the movement of the other of said pair of stops,substantially as specied.

16. In a Weighing-machine, the combination with a valve and a bucketmechanism; of a stop for Athe valve, and a bucketdscharge stop; anoscillatory locking-stop having a stopface relatively adjacent to thecenter of movement of said locking-stop, and having said stop-facenormally in locked engagement with the bucket-discharge stop; and havingastoparm provided with a Working-face relatively remote from the centerof movement of said locking-stop, and. having said Working-face inposition and adapted for limiting the operation ofthe valve-stop, andsaid lockingstop also having a locking-arm; a latch in position andadapted for engaging said locking-arm; and an actuator carried by thevalve, and adapted for releasing said latch from engagement With saidlocking-arm, to thereby disengage the stop -face from the bucket'-discharge stop, substantially as specitied.

17. InaWeighing-machine,thecombination with a valve and a bucketmechanism; of a stop for the valve; abucket-discharge stop; anoscillatory locking-stop having a stopt'ace relatively adjacent to thecenter of movement of said locking-stop, and having said stop-facenormally in locked engagement with the valvestop, and said locking-stopalso having an arm provided with a Working-face relatively remote fromthe center of movement of said locking-stop, and having said Workingfacein position and adapted for limiting the operation ,of thebucket-discharge stop; a latch for maintaining said locking-stopnormally in engagement with the valve-stop; and an actuator forreleasing said latch from engagement with the locking-arm, to therebydisengage the locking-stop and the valve-stop, substantially asdescribed.

18. In a weighing-machine, the combination with a valve mechanism and abucket mechanism; of a pair of stops, one operative with the valve as avalve-stop, and the other constituting a bucket-discharge stop; a pairof locking-stops intermediate of the valve-stop and the bucket-dischargestop, and each in position and adapted for limiting the operation of theother locking-stop, and also forrespectively limiting the operation ofthe valvestop and the bucket-discharge stop, and having one of saidlocking-stops normally in locked engagement with the bucket-dischargestop; and a latch in position and adapted for normally holding saidlocking-stop in locked engagement with the bucket-discharge stop; and anactuator in position and adapted for releasing the shiftable member fromengagel ment With the locking-stop, and thereby disengaging thelocking-stop and the bucket-discharge stop, substantially as speciied.

19. In a Weighing-machine, the combination with a valve mechanism and abucket mechanism; of a pair of stops, one operative with the valve as avalve-stop, and the other car ried by the bucket and constituting abucketdischarge stop; a pair of locking-stops, one carried by thebucket, and having said locking-stops intermediate of the valve-stop andthe bucket-discharge stop, and each in position and adapted for limitingthe operation.

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of the oth er locking-stop, and also for respectively limiting theoperation of the valvestop and the bucket-discharge stop, and having oneof said locking-stops normally in locked engagement With thebucket-discharge stop; and a shift-able member in position and adaptedfor normally holding said lockingstop in locked engagement With thebucketdischarge stop, substantially as specified.

20. InaWeighing-machine,thecombination with a valve mechanism and abucket mechanism; of a pair of stops, one operative with the valve as avalve-stop, and the other carried by the bucket and constituting abucketdischarge stop; a pair of locking-stops, one carried by thebucket, and having said locking-stops intermediate of the valve-stop andthe bucket-discharge stop, and each in position and adapted forlimitingr the operation of the other locking-stop, and also forrespectively limiting the operation of the valve-stop andbucket-discharge stop, and having one of said locking-stops normally inlocked engagement with the bucket-discharge stop; a latch in positionand adapted for normally holding the said locking-stop in lockedengagement with the bucket-discharge stop; and an actuatorin positionand adapted for releasing said latch from engagement with saidlocking-stop, and thereby disengaging said lock-stop and thebucket-discharge stop, substantially as speciiied.

2l. In aWeighing-machine, the combination with a valve mechanism and abucket mechanism; of a pair of main-stops, one operative with the valveas a valve-stop, and the other constituting a bucket-discharge stop; apair of oscillatory counterweighted locking-stops having holding-facesadjacent to the center of movement ofsaid locking-stop and adapted foralternate engagement with the main-stops, and having also arms inposition and adapted for reciprocally engaging each other at pointsrelatively remote from the center of movement of said locking-stops; alatch in position and adapted for holding one of said lockingstops inlocked engagement with the bucketdischarge stop; and an actuator inposition and adapted for releasing the latch from engagement With saidlocking stop-lever, to thereby disengage said locking-lever and thebucket-discharge stop, substantially as speciiied.

22. In a weighing-machine, the combination with a valve mechanism andwith a bucket mechanism; ot' a pair of oscillatory mainstops', oneoperative With the valve as a Valve- Stop, and the other carried by thebucket and constituting a bucket-discharge stop, and each of said stopshaving tWo stop-faces, one of which is defined by an arc drawn from thecenter of movement of said stop, and the other of which forms acontinuation of said iirst-mentioned stop-face, and is disposed betweensaid irst-mentioned stop-face and the center of movement of the stop andconstitutes a cam-face; a pair of oscillatory, shiftable locking-stops,one carried by the bucket, and each having a holding-face relativelyadjacent to the center of movement of said locking-stop,and havingsaidholding-face adapted for engagement with the corresponding camface ofits main-stop, and each of said locking-stops having an arm providedwith a Working-face located at the end thereof, and adapted for limitingthe movement of the other stop-arm, and one of said locking-stops alsohaving a locking-arm; a latch on the bucket normally in lockedengagement With said locking-arm; and an actuator carried by the valveand in position and adapted for releasing the latch from engagement Withsaid locking-arm of the locking-stop, to thereby disengage saidlocking-stop and the bucketdischarge stop, substantially as specified.

FRANCIS H. RCHARDS.

Witnesses:

FRED. J. DOLE, R. W. PITTMAN.

